Lock.



Patented July 23, I90I.

P. F E H Ll N G Lock. (Application led Oct. 20, 1900;)

(No Model.)

Tn: nanars Finns co, :maw-Uma, v/Asnmnnn u r.

Nirnn STATES PAUL FEHLING, OF BERLIN, GERMANY'.

LOCK.

SPECIFICATION forming part of Letters Patent No. 679,1 19, dated July 23, 1901.

Application filed October 20,1900. Serial No. 33,771. (No model.)

To @ZZ whom t may concern:

Be it known that I, PAUL FEHLING, a subject of the Emperor of Germany, residing at Berlin, Germany, have invented certain' new and useful Improvements in Locks, of which the following is a specification.

My invention relates to locks of that class in which sliding locking-bolts are employed; and the object thereof is to provide a simple form of lock which will require for its operation a special form of key, whereby improper operation of the same will be prevented.

To this end the invention includes a construction of lock in which the key slides with the bolt in the operation of the same, and it further includes controllers which coact with tumblers to prevent the operation of the bolt without the use of the proper key.

It further includes the details of construction, as will be hereinafter described, and particularly pointed out in the claims.

The invention is illustrated in the accompanying drawings, in which- Figure l is a sectional view of the lock. Fig. 2 is a cross-sectional view. Fig. 3 is a side elevation. Figa is a cross-sectional view. Fig. 5 is another cross-sectional view. Fig. 6 is a detail of the key. Fig. 7 is a sectional View of a modification. Fig. 8 is a cross-sec tional view, and Figs. 9 and l0 are sectional views of the saine form of lock.

In the present lock the key accompanies the rectilinear shifting movement of the bolt. With this arrangement a means for securing the bolt against movement unless the proper key is used is provided, the cross-section of the bolt-controller and the bit of the key corresponding, the bit of the key serving to ll exactly a transverse slot cut out in the controller in such a way that the little pawl-levers (so-called tumblers pressed by springpressure against the controller can slide over the transverse slot of the same in its movement without interfering in any manner with the actuation of the bolt, (the opening of the lock.) If, on the other hand, a false key is introduced the bit of which would not ll eX- actly the controller-slot or which would project from same, the tumblers would either fall into the slot like pawls or thrust against the key-bit protruding from the slot, and hence a secure locking of the bolt would be obtained in eitherl case, thus preventing opening of the lock. The tumblers maybe arranged at one or both sides of the controller.

The first form of the invention is illustrated in the drawings by Figs. l to 6, a representative form of padlock being shown, while the modied form is illustrated in Figs. 7 to l0, a box-lock being shown therein.

In the padlock, which will be described first, the bolt a, Fig. l, is intended to be actuated automatically by a spring b, catching, as a so-called snap-latch, into the snaphole d of the hasp c. To release the latch, an auxiliary slide e e or controller, arranged in a separate lock-chamber below the latch, is pushed back in the required direction, in which operation a pin f of the controller catching into a notch a of the bolt carries along the bolt. The controller consists of two blocks e e, ribbed on their under faces, between which a iiat connecting-piece e eX- tends, a space c2 being left between the blades, which is in alinement with the keyhole g of the lock-casing and which serves to receive the iiat key h, Fig. 6. with a recess h, which receives the piece e when the key is inserted.' The controller e e o n its under face is ribbed or stepped, (see Fig. 5,) and the bit of the key h corresponds exactly to this shape, so that it will just ll the slot e2 of the slide. When the parts are released after being retracted, both the bolt ct and the slide e c snap back automatically into the initial position, so that the bolt can snap again into the locking position and the key can be removed. The two outside steps 7s' of the slide serve as guides on plates Z. To retract the bolt, the key is inserted, and, as it bridges the space between the blocks e e and conforms in configuration to the same, when it is pushed laterally along the slot g to retract the bolt the tumblers z' will move uninterruptedly along the first block and the bottom of the key and over into 'the second block. It', however, a key is used which does not conform to the ribbed configuration of the controller, the ends of the tumblers will strike the end of the key if it projects into the path of the same, or if said end does not completely bridge the space between The latter is provided IOO the blocks said tumblers' will strike the end of the second block, in either case arresting the bolt. In this form the tumblers are arranged at both sides of the controller e `@,which in this case forms a continuation of the bolt, and the bit of the key h, Fig. 9, which is pushed over the stay or bridge e', corresponds exactly to the controller, which is ribbed on opposite sides. The duplication of the tumblers enhances materially the security of the lock against illicit opening'.

Assuming this lock fixed on a drawer or the like, the opening would be effected by first pressing down the controller e by means of the key h from the locking position, Fig. 8, into the opening position, Fig. l0, and then pulling out the drawer (from the wardrobe, dac.) by means of the key. The pull exercised in this operation on the key has been utilized in the present box-lock in a very simple manner for holding fast the bolt in the opening position occupied, Fig. l0.

In the front wall of the lock-casing a hori- Zontal recess m is provided at the lower eX- tremity of the vertical branch g of the keyhole and the bit of the key alines exactly with this recess when the bolt is fully retracted. This recess allows thekey to make a slight displacementin the direction of its pull to the lock when the drawer is pulled out, and owing to this displacement the bit will penetrate into the recess as much asits depth. (See Fig. 10.) Thereby the bolt is locked in the opening position-that is, it is prevented from snapping up under the action of its spring 'n into the locking position, Fig. 8, as long as the opened drawer is used. The drawer can be pushed back into the chest, &c., without first actuating the lock, and in that case it is only necessary for the closing of the lock to release the key bya lightpressure on the same from the recess m, whereupon the bolt snaps into the locking position under the action of its spring and the key returns into the (upper) position, Fig. 8, at which it can be pulled out.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In combination in a lock, a sliding bolt, controllers therefor having ribbed surfaces, spring-pressed pawls engaging the same, a space separating said ribbed surfaces, and a key adapted to ll said space having a con liguration conforming to said ribbed surfaces, substantially as described.

2. In combination in a lock, a sliding bolt, controller therefor having ribbed surfaces arranged in alinement separated by a space, a piece bridging said space, a casing having an opening in alinement with said space whenl the bolt is in locked position and a branch opening extending in the path of movement of said bolt, a series of tumblers engaging the ribs in said con troller and a key having a recess to receive said bridge-piece' and fingers corresponding to said rib portion and brid ging said space, substantially as described.

3. In combination, a sliding bolt, ribbed blocks having a sliding connection therewith, a space separating said blocks, a piece bridging said space, means for pressing the bolt and blocks forwardly, tumblers engaging with the ribs in the blocks and a key lit-ted to receive the bridge and conforming in shape to t-he ribbed surface of the blocks and adapted to bridge the space between the same, substantially as described.

4. In combination, a casing having a keyopening, a bolt guided in an upper chamber in the casin g, ribbed blocks arranged in alinement, separated by a short space and guided in a lower chamber in the casing, bridge-pieces connecting the blocks and a series of pivoted pawls, one of which is adapted to engage with each groove in the blocks and a key shaped to conform to the ribbed configuration of the blocks and to bridge the space separating the same, substantially as described.

5. In combination a sliding bolt, a casing, coacting controllers and tumble rs,a key adapted to slide with the bolt in operating the same, and means for locking the key to hold the bolt in its retracted position. I

6. In combination, a sliding bolt, a casing, coacting controllers and tumblers,a key adapted to slide with the bolt in operating the same, and means for locking the key to hold the bolt in its retracted position, said means comprising a recess in the casing adapted to engage with the key substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

PAUL FEHLING.

Witnesses:

HENRY HAsPER, WOLDEMAR HAUPT.

IOO 

